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Finding the Fourth Proportional to 5,665.56, 7,790.74 and 4,918.21

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Solution

The fourth proportional to 5,665.56, 7,790.74 and 4,918.21 is: 6,763.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,665.56 : 7,790.74 = 4,918.21 : x
  2. Step 2: Convert to fraction form
    5,665.56/7,790.74 = 4,918.21/x
  3. Step 3: Cross multiply
    5,665.56x = 7,790.74 × 4,918.21
  4. Step 4: Simplify right side
    5,665.56x = 38,316,463.60
  5. Step 5: Solve for x
    x = 38,316,463.60/5,665.56
  6. Step 6: Final answer
    x = 6,763.06

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.